Lots of social attention has been paid for the serious accident of power grid caused by bipolar latching in ultra high voltage converter station,which are related to the future development of ultra high voltage infrastructure.Compared to the traditional roughly overall load shedding approach,load fast control penetrates into the equipment of users and narrows the effect area dramatically.In this paper,the process of load fast control approach for ultra high voltage fault is analyzed first.Then,the communication framework is designed,and more details are discussed from three aspects,which are the private wire network of state grid protective relay and stability system,the load fast control communication network in power marketing side,and the load fast control terminals communication network in users.Consequently,key technologies of priority-tag based VLAN network,VPN network,Optimal scheduling of communication queues based on SPQ and WFQ,and information security protection are researched.These techniques can improve communication reliability,immediacy and safety of fault processing.Finally,the 1100 kV ultra high voltage converter station in Chengdu is treated as example to analyze load fast control communication.%特高压换流站双极闭锁等导致电网严重事故问题已引发社会高度重视,事关特高压的建设发展.相对常规稳控的一片切粗暴式甩负荷手段,负荷快切精细到用户内部,极大降低了影响面.在分析了负荷快切手段应对特高压紧急故障控制过程的基础之上,设计了负荷快切通信网络框架,从稳控侧保护专用通信网、营销侧负荷快切决策系统通信网和用户侧负荷快切终端通信网三部分进行了组网方案详细设计.针对负荷快切应对电网故障处理的通信特点和通信需求,提出基于优先级标识的VLAN组网技术、基于SPQ和WFQ通信队列优化调度方法.并结合VPN组网技术及信息安全防护等通信关键技术的应用,提升故障处理过程的通信可靠性、及时性及安全性.最后以成都11 00 kV特直换流站为例进行了负荷快切通信分析.
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